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Theorem sotri2 6034
Description: A transitivity relation. (Read 𝐴𝐵 and 𝐵 < 𝐶 implies 𝐴 < 𝐶.) (Contributed by Mario Carneiro, 10-May-2013.)
Hypotheses
Ref Expression
soi.1 𝑅 Or 𝑆
soi.2 𝑅 ⊆ (𝑆 × 𝑆)
Assertion
Ref Expression
sotri2 ((𝐴𝑆 ∧ ¬ 𝐵𝑅𝐴𝐵𝑅𝐶) → 𝐴𝑅𝐶)

Proof of Theorem sotri2
StepHypRef Expression
1 soi.2 . . . . 5 𝑅 ⊆ (𝑆 × 𝑆)
21brel 5652 . . . 4 (𝐵𝑅𝐶 → (𝐵𝑆𝐶𝑆))
32simpld 495 . . 3 (𝐵𝑅𝐶𝐵𝑆)
4 soi.1 . . . . . . 7 𝑅 Or 𝑆
5 sotric 5531 . . . . . . 7 ((𝑅 Or 𝑆 ∧ (𝐵𝑆𝐴𝑆)) → (𝐵𝑅𝐴 ↔ ¬ (𝐵 = 𝐴𝐴𝑅𝐵)))
64, 5mpan 687 . . . . . 6 ((𝐵𝑆𝐴𝑆) → (𝐵𝑅𝐴 ↔ ¬ (𝐵 = 𝐴𝐴𝑅𝐵)))
76con2bid 355 . . . . 5 ((𝐵𝑆𝐴𝑆) → ((𝐵 = 𝐴𝐴𝑅𝐵) ↔ ¬ 𝐵𝑅𝐴))
8 breq1 5077 . . . . . . 7 (𝐵 = 𝐴 → (𝐵𝑅𝐶𝐴𝑅𝐶))
98biimpd 228 . . . . . 6 (𝐵 = 𝐴 → (𝐵𝑅𝐶𝐴𝑅𝐶))
104, 1sotri 6032 . . . . . . 7 ((𝐴𝑅𝐵𝐵𝑅𝐶) → 𝐴𝑅𝐶)
1110ex 413 . . . . . 6 (𝐴𝑅𝐵 → (𝐵𝑅𝐶𝐴𝑅𝐶))
129, 11jaoi 854 . . . . 5 ((𝐵 = 𝐴𝐴𝑅𝐵) → (𝐵𝑅𝐶𝐴𝑅𝐶))
137, 12syl6bir 253 . . . 4 ((𝐵𝑆𝐴𝑆) → (¬ 𝐵𝑅𝐴 → (𝐵𝑅𝐶𝐴𝑅𝐶)))
1413com3r 87 . . 3 (𝐵𝑅𝐶 → ((𝐵𝑆𝐴𝑆) → (¬ 𝐵𝑅𝐴𝐴𝑅𝐶)))
153, 14mpand 692 . 2 (𝐵𝑅𝐶 → (𝐴𝑆 → (¬ 𝐵𝑅𝐴𝐴𝑅𝐶)))
16153imp231 1112 1 ((𝐴𝑆 ∧ ¬ 𝐵𝑅𝐴𝐵𝑅𝐶) → 𝐴𝑅𝐶)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 205  wa 396  wo 844  w3a 1086   = wceq 1539  wcel 2106  wss 3887   class class class wbr 5074   Or wor 5502   × cxp 5587
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pr 5352
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-ral 3069  df-rex 3070  df-rab 3073  df-v 3434  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-sn 4562  df-pr 4564  df-op 4568  df-br 5075  df-opab 5137  df-po 5503  df-so 5504  df-xp 5595
This theorem is referenced by:  supsrlem  10867
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